Loom



H. J. MURPHY Dec. 19, 1933.

LOOM

Filed July 13, 1932 4 Sheets-Sheet 1 IN V EN TOR. ,HJmr /y BY J Wm ATTORNEYS.

DEC. 19, M P Y LOOM Filed July 13, 1932 4 Sheets-Sheet 2 IN V EN TOR.'

Ji. JMurph A TTORNEYS.

LOOM

Filed July 13, 1932 4 Sheets-Sheet 3 IN VEN TOR.

flMurp/zy A TTORNEYS.

H. J. MURPHY Dec. 19, 1933.

LOOM

Filed July 13 1932 4 Sheets-Sheet 4 J9 INVENTOR.

ATTORNEYS.

Patented Dec. 19, 1933 r umrso STATES: PATENT OFFICE.

IJOOM' Henry James Murphy; Columbus, Ga., assignor to Bibb ManufacturingCompany, Macon, Ga a corporation of Georgia Application July 13, 1932..Serial No. 622,284

3 Claims. (Cl. 13924) employed to provide an. intermittent travel for Ythe crinkle warp, .In former let-off mechanisms for the crinkle-warpmuch .trouble has been experienced inwregulating. the length of thewaves of--.exoessin the crinkle-warp. It frequently happensthat theexcess waves are too: long, and the resulting fabric has a coarse roughappearance; then again, the excess waves aretoo short: andthozcrinklezeifect appears to be lackingin patches entire-fabric; a

eThea'object of the present invention is to provide. a IQtr-Ofimechanism for the. crinkle warp that canbe adjusted andoperated toprovide excess waves inthe warn of a uniform length and :spaced atregular intervals so that. the crinkle.- efiect. of the resulting fabricwillv be free from. blemishes. The novel let-off mechanism is describedindetail hereinafter, pointed out in the. appended claims andillustratedby-the accompanying: drawings. 1 V

In; the accompanying drawings, in which similanareference charactersdesignate correspondingparts, r

*Figure- 1 v is a side elevation of a loom with the novellef-off for.the, crinklewarp mounted thereon, only-so much of the-loom is shown asis necessary to illustrate the invention;

Figure 2. is an enlarged detail plan view of the let-oit andtheygearconnection with the sand-roll. 1 V a I Y 1 Figure 3 is a side elevationof the lef-off and the operative connection with the lay sword,partsbeing broken away.

Figure, 4 is a front elevation of the let-off. Figure 5 is; a detailview, showing the pawls for. actuating the ratchet wheels, one of thepawls' having a, trip arm projecting from its side. i i

Figuresfi and 7-- are detail views of the brake elements-for steadyingthe turning movement of the primary ratchetwheel. I 1 Figure 8' is-.aside elevation of the primary ratchet -wheel withv the dogs for trippingthe pawl shown in Figure 5 having the tripping arm.

Referring to the drawings in detail, l desig; hates a part of the. frameof a loom on which are mounted the several operativeparts. Extendingtransversely of the lower rear Tpar'tiof the frame is the beam 2carrying the ground warp threads 3, which lead from the ,beamover theidle roll 3a, through the detectors 4, the harness 5 and the reed 6, to.the takeup roll '7 and the cloth beam 8. Mounted in theupper part of theframe, to extend across the. same, is the beam 9 carrying the crinklewarpthreads 10. The latter lead from the beam 9 partly aroundthe idleroll 11 and almost entirely around the sand-roll 12, these rolls being.suitably journaled in the frame. From the sand roll the threads 10 leadthrough the detectors 4, theharness 5. and the reed 6, to thetake-uproll 7 and the cloth beam 8. The foregoing parts and their operation arewell knowninv the wear;- ing art. During the, weaving the warp threads 7from both of the beams 2-and 9 are drawn forward by the action of thetake-uprollfl and the cloth beam 8 by the means ordinarilyemployed. Alet-off, mechanism is providednto. regulate the feed of the warp 10 fromthe beam 9 .to produce the crinkle effect in the weave. This mechanismoperates to feed forward from the beam 9 the crinkle warp in excess ofthe ground warp 3 drawn from the beam 2, the excess ofcrinkle warp beingfed forward intermittently. and uniformly to meet the requirements forthe crinkle weave. This is effected by let-01f mechanism actuated by thelay of the loom to rotate intermittently the sand-roll 12 to forward theexcess of crinkle warp 10 in successive waves.

The let-off mechanism actuated .by the lay is mounted on the bracket 13securedtto .the side frame 1.. Secured at one end in this bracket is thestub-shaft 14, on the outer end of which is journaled the primaryratchet wheel 15 and on the inner end. of the stubs shaft is journaledthe secondary ratchet l6. Journaled on the stubshaft between the tworatchet wheels is the brake-hub 17 (Fig. 7) integral with the sleeve 13.Theratchet wheel 15 isclamped onthe sleeve 18 between the hub and thenut 19 turned onto the outer end of the sleeve. The hub andv sleeve forma bearing for the ratchet wheel to turn on the stub-shaft. By' thismeans, when, the ratchet wheel is turned the hub turnswith it.

Over-running of the ratchet wheel 15 is prevented by the friction strap20 (Fig. 6) encircling the hub 17. Threaded through the ends of thestrap is the vertical lowerpart-of the angular rod 21, slidably mountedat its horizontal upper part in the block 22 fixed on the horizontal arm23 secured at its inner end in the bracket 13. On the horizontal upperpart of the rod 21 is the coiled spring 24 compressed between the block22 and the angle in the rod. This spring tends to thrust the rod awayfrom the block, thereby exerting a pull on the ends of the strap 20 totighten the latter on the hub 17 to brake the rotation of the ratchetwheel 15. The strap is lined with leather to increase the frictionalengagement of the strap with the hub. By means of the threadedengagement of the rod with the ends of the strap, the grip of the latteron the hub can be adjusted to regulate the braking action on the ratchetwheel 15 to prevent over-running of the latter. Also, the thrust of therod on the strap can be regulated by varying the compression of thespring 24 on the rod. The purpose of the braking mechanism is to steadythe rotation of the wheel 15 as it is intermittently rotated.

Mechanism is provided for'intermittently rotating the ratchet wheels 15and 16. On the outer end of the stub-shaft 14 is pivoted the lever 25 atan intermediate part, held in place thereon by the cotter-pin 26inserted in the extremity of the shaft. One end of the lever isconnected by the link 2'? with an end of the bell-crank 28 fulcrumed at29 to the frame of the loom. The other end of the bell-crank isconnected by the link 30 with the lay sword 31. The oscillation of thelay sword during the operation of the loom is transmitted by theintervening mechanism to the lever 25 to oscillate the latter on thestub-shaft through a comparatively short arc. Projecting horizontallyfrom the other end of the lever 25 is the horizontal arm 32 carrying thepawls 33 and 34 respectively engaging the ratchet wheels 15 and 16. Thepawls are normally pressed into engagement with, the wheels by thesprings 35. As the lever 25 is oscillated the upward movement of thepawls turn the engagedwheels one notch.

During the operation of the loom, the ratchet wheel 15 is constantlyturned one notch at a time, but means are provided whereby the throw ofthe ratchet wheel 16 may be varied. Projecting from the inner edge ofthe pawl 34 is thetrip-arm 36 to be engaged by the stops or dogs 37detachably mounted on the inner face of the ratchet wheel 15.Ordinarily, four of these stops are employed, quadrantly spaced aroundthe ratchet wheel as shown in Figure 8.

Additional stops may be employed as indicated by dotted lines. Each ofthese stops comprises a shank adjustably attached to the inner face ofthe ratchet wheel by the set-screw 38. The outer end of the stop is bentover to form a trip As the two ratchet wheels 15 and 16 are rotated bythe oscillation of their respective pawls 33 and 34, at intervals one ofthe stops 3'7 is turned so that its trip 39 wipes the trip-arm 36 andthe pawl 34 is lifted from the ratchet wheel 16. When the pawl 34 islifted, the ratchet of stops 37. The nature of the material beingtreated and of the product require different adjustments.

The ratchet wheel 16 is compounded with the pinion 40 journaled on theinner end of the stub-shaft 14, the pinion being included in the trainof gears 4043, the gear 43 being fixed on the shaft of the sand-roll 12.The resistance of the sand-roll, transmitted through the gears 4043,prevents over-running of the ratchet wheel. Back-lash of the ratchetwheels 15 and 16 is prevented by the pawls 44 and 45 respectivelyengaging the wheels. These pawls are carried by therod 23 secured to thebracket 13 and extending over the ratchet wheels.

In the operation of the loom the warps 3 and 10 are drawn forward in theusual manner by the take-up roll '7 and the cloth beam 8. As the laysword 31 oscillates, through the intervening mechanism the lever 25 isrocked on the shaft 14 and an intermittent rotation is imparted to theratchet wheels 15 and 16. The intermittent rotation of the ratchet wheel16, through the gear-train 40 -43, turns the sandroll 12 to feed forwardthe crinkle warp 10 from the beam 9. The drive of the sand-roll is suchas to feed forward the crinkle warp in excess of the feed of theground-warp 2. At regular intervals the pawl 34 is lifted from theratchet wheel 16 and the drive of the sand-roll ceases at correspondingintervals. This results in a wave-like forward movement of the crinklewarp and Woven into the fabric, the required crinkle effect is obtained.By varying the number of the dogs 3'7, the frequency of the stops in thedrive of the sand-roll can be regulated to vary the lengths of theexcess waves in the crinkle warp, so that fabrics of different patternscan be woven.

What I claim is:-

1. In a loom for weaving crinkle cloth having a beam for the crinklewarp, a harness,- a lay and a sand-roll around which pass the threadsfrom the crinkle warp beam to the harness, in combination with a let-offfor intermittently rotating the sand-roll to feed the crinkle warp fromthe beam to the harness and lay, said letoff comprising primary andsecondary ratchet wheels oppositely mounted on a stub-shaft, a

pivoted lever carrying pawls respectively engaging the ratchet wheels,mechanism actuated by the lay for rocking the lever to operate the pawlsto rotate simultaneously the ratchet wheels, a trip mechanism actuatedby the primary wheel for lifting at' intervals the pawl of the secondarywheel so that the rotation of the secondary wheel is stopped at regularintervals during the rotation of the primary wheel, and a gear-train fortransmitting the intermittent drive of the secondary wheel 'to thesand-roll to effect intermittent forward feed of the crinkle warp fromthe beamto the harness.

2. In a loom for weaving crinkle cloth having a beam for the crinklewarp, a harness, a lay and a sand-roll around which pass the threads I;

from the crinkle warp beam to the harness, in combination with a let-offfor intermittently rotating the sand-roll to feed the crinkle warp fromthe beam to the harness and lay, said le off comprising primary andsecondary ratchet 51 wheels oppositely mounted on a stub-shaft, a leverpivoted on the stub-shaft carrying pawls respectively engaging theratchet wheels, mechanism actuated by the lay for rocking the lever tooperate the pawls to rotate simultaneously 1.

the ratchet wheels, a series of adjustable dogs spaced apart on theprimary ratchet wheel operating successively as the primary wheel isturned to lift the pawl of the secondary ratchet wheel so that therotation of the secondary wheel is stopped at intervals during therotation of the primary wheel, and a gear-train for transmitting theintermittent drive of the secondary wheel to the sand-roll to effectintermittent forward feed of the crinkle warp from the beam to theharness.

3. In a loom for weaving crinkle cloth having a beam for the crinklewarp, a harness, a lay and a sand-roll around which pass the threadsfrom the crinkle warp beam to the harness, in combination with a let-offfor intermittently rotating the sand-roll to feed the crinkle warp fromthe beam to the harness and lay, said letoff comprising primary andsecondary ratchet the rotation of the secondary wheel is stopped atregular intervals during the rotation of the primary wheel, and agear-train for transmitting the intermittent drive of the secondarywheel to the sand-roll to eflect intermittent forward feed of thecrinkle warp from the beam to the harness.

HENRY JAMES MURPHY.

